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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following group(s) when attached to a benzene ring decreases the electron density at ortho/para positions? |
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Answer» Which of the following group(s) when attached to a benzene ring decreases the electron density at ortho/para positions? |
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| 2. |
Which of these is not a monomer for a high molecular mass of silicon polymer 1)Me2SiCl2 2)MeSiCl3 3)Me3SiCl 4)phSiCl3 |
| Answer» Which of these is not a monomer for a high molecular mass of silicon polymer 1)Me2SiCl2 2)MeSiCl3 3)Me3SiCl 4)phSiCl3 | |
| 3. |
What value of m is assigned to d x2-y2 orbital |
| Answer» What value of m is assigned to d x2-y2 orbital | |
| 4. |
The angular momentum of the electron in the second orbit of hydrogen atom is L. The angular momentum in the third orbit is |
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Answer» The angular momentum of the electron in the second orbit of hydrogen atom is L. The angular momentum in the third orbit is |
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| 5. |
At 25°C, 100 ml 0.1 M HCl and 50 ml 0.2 M NaOH was mixed. pH of the mixture will be67810 |
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Answer» At 25°C, 100 ml 0.1 M HCl and 50 ml 0.2 M NaOH was mixed. pH of the mixture will be 6 7 8 10 |
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| 6. |
39. Para dichlorobenzene has higher melting point and solubility than those of ortho and meta isomer.why? |
| Answer» 39. Para dichlorobenzene has higher melting point and solubility than those of ortho and meta isomer.why? | |
| 7. |
Select whether the following combinations of reactants will react by substitution (SN1, SN2 or elimination (E1, E2 mechanism). |
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Answer» Select whether the following combinations of reactants will react by substitution (SN1, SN2 or elimination (E1, E2 mechanism). |
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| 8. |
Zn−Hg−−−−→HClproduct of the clemmensen reduction is |
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Answer»
Zn−Hg−−−−→HClproduct of the clemmensen reduction is
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| 9. |
What is the increase in entropy when 11.2L of O2 are mixed with 11.2 L of H2 at STP? |
| Answer» What is the increase in entropy when 11.2L of O2 are mixed with 11.2 L of H2 at STP? | |
| 10. |
the enthalpy of reaction at 273K is -3.57kJ ,what will be the enthalpy of reaction at 373K if △ Cp=zero |
| Answer» the enthalpy of reaction at 273K is -3.57kJ ,what will be the enthalpy of reaction at 373K if △ Cp=zero | |
| 11. |
What would be the electronic configuration of following coordination compounds:1)[Co(NH3)6]+22)[Co(NH3)6]+33)[Co(CN)6]+24)[Co(CN)6]+3 |
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Answer» What would be the electronic configuration of following coordination compounds: 1)[Co(NH3)6]+2 2)[Co(NH3)6]+3 3)[Co(CN)6]+2 4)[Co(CN)6]+3 |
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| 12. |
100 ml of water sample with initial pH 7.5 is titrated to pH=4.5 using 15 ml of 0.02 N H2SO4. The total alkalinity of water (in mgl as CaCO3). Rounded off to nearest integer is150 |
Answer» 100 ml of water sample with initial pH 7.5 is titrated to pH=4.5 using 15 ml of 0.02 N H2SO4. The total alkalinity of water (in mgl as CaCO3). Rounded off to nearest integer is
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| 13. |
Ozonolysis of which one of the following will give two molecules of acetaldehyde |
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Answer» Ozonolysis of which one of the following will give two molecules of acetaldehyde |
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| 14. |
Calculate the masses of P4O6 and P4O10 that would beproduced by the combustion of 3.0gram of P4 in 3.0gram of oxygen leaving no O2 or P4. |
| Answer» Calculate the masses of P4O6 and P4O10 that would beproduced by the combustion of 3.0gram of P4 in 3.0gram of oxygen leaving no O2 or P4. | |
| 15. |
The complex \lbrack M(NH3)6\rbrack2+absorbs energy corresponding to x nm.Which wavelength in nm \lbrack M(NH3)4\rbrack2+(tetrahedral)is likely to absorb |
| Answer» The complex \lbrack M(NH3)6\rbrack2+absorbs energy corresponding to x nm.Which wavelength in nm \lbrack M(NH3)4\rbrack2+(tetrahedral)is likely to absorb | |
| 16. |
For a given gas , predict the relationship between KH1,KH2,KH3 from the given graph.(where KH is henry's law constant) |
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Answer» For a given gas , predict the relationship between KH1,KH2,KH3 from the given graph. |
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| 17. |
Specific conductance of 0.1 MCH3COOH at 25∘ is 3.9×10−4ohm−1cm−1. If λ∞(H3O+) and λ∞(VH3COO−) at 25∘C are 349.0 and 41.0 ohm−1cm2mol−1 respectively, degree of ionization of CH3COOH at the given concentration is : |
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Answer» Specific conductance of 0.1 MCH3COOH at 25∘ is 3.9×10−4ohm−1cm−1. If λ∞(H3O+) and λ∞(VH3COO−) at 25∘C are 349.0 and 41.0 ohm−1cm2mol−1 respectively, degree of ionization of CH3COOH at the given concentration is : |
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| 18. |
in williamson synthesis reaction of ethers the alkyl group of alkyl halide (R-X) could be secondary or not? |
| Answer» in williamson synthesis reaction of ethers the alkyl group of alkyl halide (R-X) could be secondary or not? | |
| 19. |
The I.P. of a hydrogen like species is 36eV . What is the value of second excitation energy ? A)5 eV B)12eV C)32eV D)27e |
| Answer» The I.P. of a hydrogen like species is 36eV . What is the value of second excitation energy ? A)5 eV B)12eV C)32eV D)27e | |
| 20. |
" For a first order reaction, X-> Y, t1/3=1 hr. What fraction of the initial conc. of X reacts in the second hour from the start of the reaction ?(a) 1/9(b) 2/9(c) 1/27(d)4/2 |
| Answer» " For a first order reaction, X-> Y, t1/3=1 hr. What fraction of the initial conc. of X reacts in the second hour from the start of the reaction ?(a) 1/9(b) 2/9(c) 1/27(d)4/2 | |
| 21. |
The compound(s) that exhibit(s) geometrical isomerism is/are |
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Answer» The compound(s) that exhibit(s) geometrical isomerism is/are |
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| 22. |
what is superposition? |
| Answer» what is superposition? | |
| 23. |
Which of the following group show +M > –I effect? |
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Answer» Which of the following group show +M > –I effect? |
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| 24. |
38.why is ammonia more basic than benzylamine? |
| Answer» 38.why is ammonia more basic than benzylamine? | |
| 25. |
CH,30. The number of a-hydrogen atoms present in C2H5- \overset{}{\underset+C}H-CH3 is (1) 9(2) 8(4) 4(3) 5 |
| Answer» CH,30. The number of a-hydrogen atoms present in C2H5- \overset{}{\underset+C}H-CH3 is (1) 9(2) 8(4) 4(3) 5 | |
| 26. |
derive the formula of instantanious velocity |
| Answer» derive the formula of instantanious velocity | |
| 27. |
\lbrack JEE (Main)-2014\rbrack For the estimation of nitrogen, 1.4 g of anorganic compound was digested by Kjeldahlmethod and the evolved ammonia wasMabsorbed in 60 mL ofsulphuric acid. The10unreacted acid required 20 mL ofsodium10hydroxide for complete neutralization. Thepercentage of nitrogen in the compound is(1) 6%(2)10%(3) 3%(4) 5% |
| Answer» \lbrack JEE (Main)-2014\rbrack For the estimation of nitrogen, 1.4 g of anorganic compound was digested by Kjeldahlmethod and the evolved ammonia wasMabsorbed in 60 mL ofsulphuric acid. The10unreacted acid required 20 mL ofsodium10hydroxide for complete neutralization. Thepercentage of nitrogen in the compound is(1) 6%(2)10%(3) 3%(4) 5% | |
| 28. |
In nitration of benzene |
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Answer» In nitration of benzene |
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| 29. |
Which of the following will have the highest boiling point at 1 atm pressure: |
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Answer» Which of the following will have the highest boiling point at 1 atm pressure: |
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| 30. |
Which of the following is least basic? |
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Answer» Which of the following is least basic? |
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| 31. |
Which of the following is formed when lithium is heated in air? |
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Answer» Which of the following is formed when lithium is heated in air? |
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| 32. |
what is the mechanism of acidic hydrolysis of 1 methyl 1cyclohexylhydrogenperoxide?? |
| Answer» what is the mechanism of acidic hydrolysis of 1 methyl 1cyclohexylhydrogenperoxide?? | |
| 33. |
The osmotic pressure of equimolar solutions of urea, BaCl2 and AlCl3 will be in the order- |
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Answer» The osmotic pressure of equimolar solutions of urea, BaCl2 and AlCl3 will be in the order- |
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| 34. |
The Mole fraction of glucose in aqueous solution is 0.2, then molality of solution will be |
| Answer» The Mole fraction of glucose in aqueous solution is 0.2, then molality of solution will be | |
| 35. |
the major product formed by the reaction of 1,1,1trichloroethane with silver powder i |
| Answer» the major product formed by the reaction of 1,1,1trichloroethane with silver powder i | |
| 36. |
Find the ratio of molecules, atoms individually in equal weight of methane and ammonia. |
| Answer» Find the ratio of molecules, atoms individually in equal weight of methane and ammonia. | |
| 37. |
In which of the following orbitals electron will be filled first? |
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Answer» In which of the following orbitals electron will be filled first? |
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| 38. |
Pyrolusite is a/an |
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Answer» Pyrolusite is a/an |
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| 39. |
Is SeO2 polymeric? If so what is the hybridization of Se? |
| Answer» Is SeO2 polymeric? If so what is the hybridization of Se? | |
| 40. |
The sodium salt of a certain weak monobasic organic acid is hydrolysed to an extent of 3% in its 0.1 M solution at 25∘C given that the ionic product of water is 10−14 at this temperature, what is the dissociation constant of the acid? |
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Answer» The sodium salt of a certain weak monobasic organic acid is hydrolysed to an extent of 3% in its 0.1 M solution at 25∘C given that the ionic product of water is 10−14 at this temperature, what is the dissociation constant of the acid? |
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| 41. |
41. What is the Lewis dot structure of phosphate ion? how many coordinate covalent bonds are present?? |
| Answer» 41. What is the Lewis dot structure of phosphate ion? how many coordinate covalent bonds are present?? | |
| 42. |
A very thin metallic shell of radius r is heated to temp T and then allowed to cool. Rate of cooling of shell is proportional to (1) rT. (2) 1/r. (3)r2. (4) r0 Explain with eg in simple language |
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Answer» A very thin metallic shell of radius r is heated to temp T and then allowed to cool. Rate of cooling of shell is proportional to (1) rT. (2) 1/r. (3)r2. (4) r0 Explain with eg in simple language |
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| 43. |
Why non volatile solutes not applicable for Raoult law |
| Answer» Why non volatile solutes not applicable for Raoult law | |
| 44. |
26/A pump is designed as a horizontal cylinder with a piston of area A and an outlet orifice of areaa arranged near the cylinder axis. Find the velocity of out flow of the liquid from the pump if thepiston moves with a constant velocity under the action of a constant force F. The density of theiquid is p |
| Answer» 26/A pump is designed as a horizontal cylinder with a piston of area A and an outlet orifice of areaa arranged near the cylinder axis. Find the velocity of out flow of the liquid from the pump if thepiston moves with a constant velocity under the action of a constant force F. The density of theiquid is p | |
| 45. |
An electron jumps from the first excited state to the ground state of the hydrogen atom. What will be the percentage change in the speed of the electron |
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Answer» An electron jumps from the first excited state to the ground state of the hydrogen atom. What will be the percentage change in the speed of the electron |
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| 46. |
Cr_2O_7^{2-}+Pb^{+2}→ Cr^{+3}+Pb^{+4} Balance the redox reaction by ion electron method |
| Answer» Cr_2O_7^{2-}+Pb^{+2}→ Cr^{+3}+Pb^{+4} Balance the redox reaction by ion electron method | |
| 47. |
38 What is the IUPAC name of benzene? |
| Answer» 38 What is the IUPAC name of benzene? | |
| 48. |
Define momentum |
| Answer» Define momentum | |
| 49. |
How do you explain the presence of five -OH groups in glucose molecule? |
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Answer» How do you explain the presence of five -OH groups in glucose molecule? |
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| 50. |
A monatomic ideal gas, initially at temperature T1 is enclosed in a cylinder fitted with a frictionless piston. The gas is allowed to expand adiabatically to a temperature T2 by releasing the piston suddenly. If L1 and L2 are the lengths of the gas column before and after expansion respectively, then T1T2 is given by |
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Answer» A monatomic ideal gas, initially at temperature T1 is enclosed in a cylinder fitted with a frictionless piston. The gas is allowed to expand adiabatically to a temperature T2 by releasing the piston suddenly. If L1 and L2 are the lengths of the gas column before and after expansion respectively, then T1T2 is given by |
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